TWI687278B - Chuck apparatus - Google Patents

Abstract

A chuck apparatus (10) grips a workpiece by a gripping section (18) having a pair of chuck members (20). The chuck apparatus (10) is equipped with a cover member (22) and pressing members (24). The cover member (22) includes insertion holes (80) through which fingers (68) of the chuck members (20) are inserted, and seal members (90) that surround the insertion holes (80) and abut against the fingers (68). The cover member (22) is attached to a body (12) so as to cover base portions (66) of the chuck members (20), and is elastically deformable so as to follow displacement of the chuck members (20). The pressing members (24) press the seal members (90) against the fingers (68).

Description

Clamp device

The invention relates to a clamping device which clamps a workpiece by a clamping section which can be opened and closed.

Before this, for example, it is known that a clamp device is installed on the distal end of a shaft of a machine tool or the like. In this clamping device, the opening and closing operations of the clamping section composed of a pair of clamping members are performed under the supply of pressure fluid or electronic signals, thereby clamping the workpiece, such as various parts or the like ( For example, refer to Japanese Laid-Open Patent Publication No. 2008-173692). In such a clamp device, the clamp member is provided so as to be movable relative to the clamp device body.

Incidentally, in order to properly maintain the smooth movement of the clamp member, it may be considered to provide a cover (protective cover) to prevent dust or moisture or the like from entering the sliding portion between the body and the clamp member, and to enter A mechanism to move the clamp member. In this case, it is preferable that the cover member can prevent dust or moisture or the like from entering between the jaw member and the cover member without disturbing the movement of the jaw member.

Has been created in consideration of the above problems and to provide a clamp device The object of the present invention is provided with a structure that can properly prevent dust or moisture or the like from entering through the cover member.

In order to achieve the foregoing objective, the present invention features a clamping device including a body and a clamping section configured to be opened and closed, the clamping section including a pair of clamping members supported on the body , Wherein at least one of the clamping members is movable relative to the body, and the workpiece is clamped by the clamping section, wherein the clamping device further includes a cover member including an insertion hole, the clamping members The finger of the one is inserted through the insertion hole, and a member configured to surround the insertion hole and abut the finger, wherein the cover is attached to the body so as to cover the clips The base portion of the jaw member is elastically deformable so as to follow the displacement of the one of the jaw members, and a pressing member assembled to press the sealing member against the finger.

According to the jaw device constructed in the above manner, the pressing member presses the sealing member of the lid against the finger. Therefore, when the clamping member is displaced to open and close the clamping section, a gap between the sealing member and the finger can be prevented. Therefore, good sealing properties can be obtained, and the cover can exhibit proper dustproof and waterproof functions.

In the above jaw device, the pressing member may form an annular shape surrounding the finger, and the sealing member may be sandwiched between the pressing member and the finger in an elastically compressed state.

When constructed in this way, since the sealing member will maintain close contact with the finger under the "squeeze" applied to the sealing member with the ring-shaped pressing member, better sealing properties may be obtained.

In the above jaw device, the pressing member may include a plurality of pressing sections arranged side by side along the circumferential direction, and the sealing member may be installed between the plurality of pressing sections and the fingers.

According to this configuration, in the assembly process of the clamp device, since the plurality of pressing sections are slightly elastically deformed when the sealing member of the cover member is installed between the pressing member and the finger, this has Help its assembly.

In the aforementioned jaw device, the pressing member may be provided on the inner side of the cover.

According to this configuration, the pressing member can be provided in a small space, and it is possible to reliably prevent the pressing member from falling off.

In the above jaw device, the pressing member may be provided on the outer side of the cover.

According to this configuration, when assembling the pressing member, the pressing member can be easily installed from the outside of the cover.

In the above jaw device, the other jaw member of the pair of jaw members is also movable relative to the body, and the cover member further includes another insertion hole and another formed corresponding to the other jaw member The sealing member, and further provides another pressing member corresponding to the other clamping member.

According to this structure, in the jaw device that clamps the workpiece by the movement of both of the pair of jaw members, the gap between the sealing member and the fingers can be effectively prevented, and the cover can exhibit proper dustproofing And waterproof function.

According to the clamp device of the present invention, the cover member can be used appropriately Prevent entry of dust or moisture or the like.

The above and other objects, features, and advantages of the present invention can be more clearly understood from the following description in conjunction with the accompanying drawings, in which preferred specific embodiments of the present invention are illustrated by exemplary embodiments.

10、10a‧‧‧Clamp device

12‧‧‧Body

13‧‧‧cylinder bore

14‧‧‧ Piston

15‧‧‧Pressure chamber

15a‧‧‧First room

15b‧‧‧Second Room

16‧‧‧Leverage

18‧‧‧Clamping section

20‧‧‧Clamp member

22‧‧‧Cover

24, 24a‧‧‧Pressed components

27‧‧‧ First port

28‧‧‧Second port

30‧‧‧Cap

32‧‧‧Annular sealing member

34‧‧‧locking ring

35‧‧‧Cylinder section

36‧‧‧Basic section

37‧‧‧Trench

38‧‧‧Track groove

39‧‧‧Supporting member

40‧‧‧The main part of the piston

42‧‧‧Pole part

44‧‧‧Annular groove

46‧‧‧Annular piston seal

48‧‧‧Magnet

50‧‧‧Pole hole

52‧‧‧ Rod seal

53‧‧‧Damper

54‧‧‧Latch

56‧‧‧First end

58‧‧‧The second end

62‧‧‧Link bolt

64‧‧‧Cut part

66‧‧‧Base part

68‧‧‧ finger

69‧‧‧Root

70‧‧‧Groove

72‧‧‧Sphere

74‧‧‧End plate

76‧‧‧joint groove

77‧‧‧screw

78a to 78d

80‧‧‧insert hole

82‧‧‧Main wall

83‧‧‧protrusion

84‧‧‧Side wall

84a‧‧‧End

86‧‧‧Trench

88‧‧‧ Bellows section

90、90a‧‧‧Sealing member

92‧‧‧Annular ring member

94‧‧‧Suppression section

a‧‧‧Axis

Fig. 1 is a perspective view showing a clamp device according to an embodiment of the present invention; Fig. 2 is an expanded perspective view of the clamp device of Fig. 1; Fig. 3 is a cross section of the clamp device of Fig. 1 Figure 4 shows a perspective view of the clamping device according to a variant; and Figure 5 is a cross-sectional view of the clamping device of Figure 4.

The following describes preferred embodiments of the clamp device of the present invention with reference to the drawings.

As shown in FIGS. 1 to 3, the clamp device 10 is provided with a body 12 in which a cylinder hole 13 is formed, and is disposed inside the body 12 along the axis a direction of the cylinder hole 13 (hereinafter referred to as “axial direction”) ) A displaced piston 14, and a clamping section 18 that can perform opening and closing operations and has a pair of clamp members 20 connected to the piston 14 by a lever 16. In addition, the clamp member 20 is provided with a cover 22 attached to the body 12 and covering the base part side of the clamping section 18, and for ensuring the tightness between the clamp member 20 and the cover 22的压组24。 The pressure member 24.

As shown in Figure 3, the first end opened on the side of the body 12 The port 27 and the second port 28 perform supply and discharge of pressure fluid (for example, compressed air) with respect to the inside of the cylinder bore 13.

The cylinder bore 13 is provided with a cap 30 on the open end side, and the cylinder bore 13 is closed and sealed with the cap 30 to form a pressure chamber 15 inside the body 12. The ring-shaped sealing member 32 mounted on the outer peripheral surface of the cap 30 abuts against the inner peripheral surface of the cylinder hole 13, thereby maintaining the airtightness in the cylinder hole 13. In addition, a lock ring 34 is attached to the inner circumferential surface of the cylinder hole 13, thereby fixing the cap 30 to the cylinder hole 13.

The first port 27 and the second port 28 are arranged so as to have a predetermined distance in the axial direction of the body 12 therebetween. The first port 27 communicates with a space on one end face side of the piston 14, and the second port 28 communicates with another space between the cap 30 and the other end face of the piston 14. The first port 27 and the second port 28 are connected to a pressure fluid supply source (not shown).

A base section 36 is provided on an end portion of the body 12, which is on the opposite side to the side where the cap 30 is provided, and a supporting member 39 that movably supports the clamping section 18 is fixed至基段部36。 To the base segment 36. A track groove 38 for displaceably guiding a pair of clamping segments 18 to the clamping member 20 is formed in the supporting member 39. The track groove 38 extends in a direction substantially perpendicular to the axis a of the cylinder hole 13.

Under the body 12 of the illustrated embodiment, the base segment 36 and the cylinder segment 35 are integrally formed, and the cylinder segment 35 is a portion that houses the piston 14 therein. However, in the other variant, the cylinder segment 35 and the base segment 36 may be formed as separate components.

The piston 14 includes the pressure chamber 15 of the body 12 divided into the first The piston body portion 40 of the chamber 15a and the second chamber 15b, and the rod portion 42 having a reduced diameter relative to the piston body portion 40 and protruding from the piston body portion 40 toward the clamping section 18 side.

An annular groove 44 is formed on the outer peripheral portion of the piston body portion 40, and the annular piston seal 46 is fitted into the annular groove 44. By keeping the piston seal 46 in close contact with the inner circumferential surface of the cylinder bore 13 along the entire circumference, the air can be properly maintained between the first chamber 15a and the second chamber 15b divided axially by the piston body portion 40 Dense. The surface of the piston body portion 40 on the side opposite to the clamping section 18 is configured to face the cap 30.

In addition, the magnet 48 is disposed adjacent to the piston seal 46 on the outer peripheral surface of the piston body portion 40. By detecting the magnetic force from the magnet 48 using a position detection sensor (not shown), the position of the piston body portion 40 in the axial direction can be confirmed.

The rod portion 42 is inserted through a rod hole 50 having a reduced diameter relative to the cylinder hole 13. A rod packing 52 provided on the inner circumferential surface of the rod hole 50 abuts the outer circumferential surface of the rod portion 42. A damper 53 made of, for example, an elastic material (for example, rubber or the like) is mounted on the base of the rod portion 42. Therefore, when the piston 14 is displaced toward the clamping section 18 and abuts against the wall forming the end portion of the cylinder bore 13, the impact can be cushioned.

The pair of levers 16 is swingably engaged with the lever portion 42 through a latch 54 provided on the lever portion 42. Each lever 16 is formed in a substantially L-shape, and includes a first end 56 engaged with the lever portion 42 and a second end 58 engaged with the jaw member 20. In addition, the lever 16 is substantially pivotally supported at the central portion thereof through the The pair of connecting pins 62 is rotatable. The first end 56 of each lever 16 has a cutout portion 64 formed therein, and the cutout portion 64 is engaged with the latch 54 provided on the end of the lever portion 42.

In addition, each lever 16 is formed to gradually narrow from the portion supported by the connecting pin 62 toward the second end portion 58, and the second end portion 58 is pivotally supported in the base portion 66 of the clamp member 20 described later . Therefore, by the displacement of the rod portion 42 in the axial direction, the pair of levers 16 is rotatably displaced via the connecting pin 62 in such a manner that the second ends 58 will approach and separate from each other.

The clamping section 18 includes the pair of clamping members 20 movable relative to the body 12. In this particular embodiment, the clamp member 20 is supported on the body 12 so as to be displaceable along the track groove 38 (in a direction perpendicular to the axis a). More specifically, each clamp member 20 includes a block-shaped base portion 66 guided in the track groove 38, and fingers 68 protruding from the base portion 66 on its opposite side to the body 12.

Grooves 70 extending in the moving direction of the clamp member 20 are formed in the respective side surfaces of the respective base portions 66, and a plurality of balls 72 are arranged in a straight line in the respective grooves 70. The ball 72 is left in the groove with the end plates 74 attached to both end faces (end faces on both sides in the moving direction of the clamp member 20) of each base portion 66. In addition, the sphere 72 remains between the groove 70 formed in the base portion 66 and the track groove 38 formed in the base segment 36. Due to this structure, when the grip member 20 is displaced along the track groove 38, the displacement resistance is reduced, so the grip member 20 can be smoothly displaced in the moving direction.

In each jaw member 20, the base portion 66 is provided with an engagement groove 76 on the surface of the lever 16 side that is engaged with the second end portion 58 of the lever 16 in a fitted state. The second end 58 of the lever 16 is joined to rotate within the engagement groove 76.

The base portion 66 is covered by the cover 22. More specifically, the base portion 66 is accommodated inside the cover 22. On the other hand, the root portion 69 of the finger 68 penetrates the cover member 22, and the free end side of the finger 68 for holding the workpiece is exposed outside the cover member 22. In the case of this specific embodiment, the root 69 of the finger 68 penetrating the cover 22 has a circular cross section.

The entire cover 22 is composed of an elastic material, such as a rubber material or an elastomer material, and is attached to the body 12 in a state of covering the base portion 66 of the pair of jaw members 20. In this specific embodiment, the shape of the cover 22 is substantially rectangular when viewed from a plan view. More specifically, the cover 22 includes a main wall 82 in which two insertion holes 80 inserted through the fingers 68 of the clamp member 20 are formed, and extends from the periphery of the main wall 82 toward the body 12 and is fixed to the body 12 The base segment 36 has a side wall 84 in an airtight state.

On the main wall 82, a plurality of grooves 86 are formed therebetween so that the cover 22 can be easily elastically deformed along the moving direction of the jaw member 20. Due to the plurality of grooves 86, a bellows section 88 having a corrugated cross section is formed in the cover member 22. The bellows segment portions 88 are each provided at a portion between the two insertion holes 80 of the cover 22 and at a portion on the outer side of the two insertion holes 80. Since the cover member 22 is constituted in this way, the cover member 22 can be elastically deformed so as to follow the displacement of the jaw member 20 when the jaw member 20 is moved to open and close the grip section 18.

The two insertion holes 80 provided in the cover member 22 are the parts through which the fingers 68 (root 69) are inserted, and in the case of this embodiment, they are installed in the form of the roots of the fingers 68 69 round holes with matching shapes. In the cover member 22, the portions surrounding the two insertion holes 80 are each formed in the form of annular seal members 90 each abutting the outer peripheral surface of the finger 68. The inner circumferential surface of the sealing member 90 is arranged to abut the outer circumferential surface of the finger 68 (the root portion 69) so as to surround the entire circumference.

A protrusion 83 that protrudes inward and makes one turn along the side wall 84 is formed at the end 84 a of the side wall 84 on the side opposite to the main wall 82. The protrusion 83 fits into the groove 37 formed on the outer peripheral surface of the base segment 36. In addition, the end 84a of the side wall 84 is pressed against and attached to the base segment 36 by fixing plates 78a to 78d, and the plates 78a to 78d are fixed to the base segment 36 with screws 77. As a result, the tip 84a is fixed to the base segment 36 in an airtight manner.

The pressing member 24 presses the sealing member 90 of the cover 22 against the fingers 68 of the jaw member 20. Since the pressing member 24 does not undergo substantial deformation (elastic stretching) even when the clamp member 20 is displaced relative to the body 12 to open and close the clamping section 18, the pressing member 24 can surround the entire sealing member 90 The periphery is pressed against the finger 68. In order to realize this function, the pressing member 24 is preferably composed of a rigid material (hard resin, metal material or the like).

More specifically, the pressing member 24 is formed in an annular shape that can surround the fingers 68, and the sealing member 90 is sandwiched between the pressing member 24 and the fingers 68 in an elastically compressed state.

As shown in Figures 2 and 3, in this specific embodiment In this case, the pressing members 24 each include an annular ring member 92, and a plurality of pressing segment portions 94 protruding from the ring member 92 and arranged side by side in the circumferential direction with intervals therebetween. The shape of each pressing section 94 is formed into an arc shape. Each sealing member 90 is installed in a press-fit state between the finger 68 and the plurality of pressing sections 94. More specifically, the sealing member 90 is pressed against the fingers 68 by a plurality of pressing sections 94, and with this pressing force, the sealing member 90 is elastically compressed in the radial direction (extruded state). As a result, the inner peripheral surface of the sealing member 90 is placed so as to be able to abut the outer peripheral surface of the finger 68 (the root portion 69) around the entire circumference.

In addition, as shown in FIG. 3, in this specific embodiment, the sealing member 90 protrudes from the main wall 82 toward the inside of the cover 22 (the base portion 66 side of the clamp member 20), and inside the cover 22, pressed The member 24 is configured to surround the sealing member 90. In addition, the pressing member 24 is disposed between the base portion 66 of the clamp member 20 and the main wall 82 of the cover 22.

Next, the operation and advantageous effects of the clamp device 10 are explained.

When a pressure fluid supply source (not shown) supplies pressure fluid to the first chamber 15 a of the body 12 through the first port 27, the piston 14 is displaced away from the clamping section 18. As the piston 14 is displaced, the first end 56 of the pair of levers 16 engaged with the rod portion 42 of the piston 14 is pulled toward the piston body portion 40 side. In this case, the second port 28 is in a state of communicating with the atmosphere.

Therefore, the pair of levers 16 each rotate around the connecting pin 62 so that the second ends 58 of them rotate in the direction of approaching each other, and The pair of jaw members 20 engaged by the ends 58 are displaced toward each other. At this time, the cover 22 inserted by the finger 68 is elastically deformed so as to follow the displacement of the jaw member 20, whereby the sealing member 90 and the pressing member 24 are also displaced together with the jaw member 20. In addition, by the pair of jaw members 20 operated by the clamping section 18 in the above-described manner, a workpiece (not shown) can be clamped with a predetermined pressure.

On the other hand, in the case where the workpiece clamped by the clamping section 18 is to be released, the pressure fluid that has been supplied to the first chamber 15a is supplied through the second port 28 under the switching action of a switching valve (not shown) Not the second room 15b. In this case, the first port 27 is in a state of communicating with the atmosphere. As a result, the piston 14 is displaced to the side of the clamping section 18 under the compression of the pressure fluid guided to the second chamber 15b.

In addition, as the piston 14 is displaced, the pair of levers 16 engaged with the rod portion 42 each rotate around the connecting pin 62 such that their second ends 58 rotate away from each other. Therefore, the pair of jaw members 20 engaged with the lever 16 are displaced away from each other. At this time, the cover 22 inserted by the finger 68 is elastically deformed to follow the displacement of the jaw member 20, whereby the sealing member 90 and the pressing member 24 are also displaced together with the jaw member 20. In addition, with the operation of the pair of jaw members 20 in this way, the clamping of the workpiece can be released.

In this case, according to the jaw device 10 configured in the above-described manner, the pressing member 24 presses the sealing member 90 of the cover 22 against the fingers 68. Therefore, when the clamping member 20 is displaced to open and close the clamping section 18, a gap between the sealing member 90 and the finger 68 can be prevented. Therefore, a good sealing property can be obtained, and the cover 22 can exhibit a suitable When the dust and waterproof functions.

For example, in this case, if the pressing member 24 is not installed in the clamping device 10, when the clamping member 20 is displaced to open and close the clamping section 18, since the sealing member 90 elastically stretches, There may be a gap between the sealing member 90 and the finger 68. This is because in the case where the pressing member 24 is not installed, the force used by the sealing member 90 against the fingers 68 is based only on the elastic stretching force of the sealing member 90 itself. In contrast, according to the clamp device 10 provided with the pressing member 24, the sealing member 90 of the cover 22 is pressed against the fingers 68 by the pressing member 24 in an elastically compressed state. Therefore, when the jaw member 20 is also displaced, since the state of close contact between the sealing member 90 and the finger 68 is maintained, there is no possibility of a gap between the sealing member 90 and the finger 68.

In particular, in the case of this specific embodiment, the pressing member 24 is formed into an annular shape that can surround the fingers 68, and the sealing member 90 is sandwiched between the pressing member 24 and the fingers 68 in an elastically compressed state between. Since it is constituted in this way, since the sealing member 90 and the finger 68 are kept in close contact under the "squeeze" effect applied to the sealing member 90 with the ring-shaped pressing member 24, better sealing properties can be obtained.

In addition, in the case of this specific embodiment, the pressing members 24 each include a plurality of pressing sections 94 arranged side by side along the circumferential direction, and the sealing member 90 is installed between the plurality of pressing sections 94 and the fingers 68 between. According to this configuration, in the assembly process of the clamp device 10, since the plurality of pressing sections 94 are slightly elastically deformed when the sealing member 90 of the cover member 22 is installed between the pressing member 24 and the finger 68, this has Help its group Outfit.

Furthermore, in the case of the present specific embodiment, because the pressing member 24 is arranged on the inner side of the cover 22, the pressing member 24 can be provided in a small space, and it is possible to reliably prevent the pressing member 24 from falling off.

Furthermore, in the case of this specific embodiment, both the pair of jaw members 20 are arranged to be movable relative to the body 12, and the pressing members 24 are each mounted on the sealing member 90. Therefore, in the clamping device 10 that clamps the workpiece by the movement of both the pair of clamping members 20, the gap between the sealing member 90 and the fingers 68 can be effectively prevented, and the cover 22 can be properly displayed The dustproof and waterproof function.

In the jaw device 10 a shown in the modification of FIGS. 4 and 5, the pressing member 24 a is provided on the outer side of the cover 22. In this case, in the cover 22, the sealing member 90 a surrounding the root 69 of the finger 68 protrudes from the main wall 82 to the side opposite to the base portion 66. In addition, the pressing member 24 a formed in a ring shape is configured to surround the sealing member 90 a at a position outside the cover 22 and press the sealing member 90 a against the finger 68. In addition, the sealing member 90a is sandwiched between the pressing member 24a and the fingers 68 in an elastically compressed state, and the pressing member 24a is in a state of being tightly fitted on the outer side of the sealing member 90a. Therefore, the pressing member 24a cannot be detached from the cover 22 and the fingers 68.

According to the jaw device 10a of this modification, when the pressing member 24a is assembled, the pressing member 24a can be easily installed from the outside of the cover 22.

In the clamp devices 10, 10a, the pair of clamp members 20 may be supported on the body 12 so as to be able to rotate about the respective pivot points.

In the above-mentioned clamping device 10, 10a, only one of the pair of clamping members 20 is movable relative to the body 12, and the other clamping member 20 is not necessarily movable relative to the body 12. More specifically, the clamping section 18 may be configured to clamp the workpiece by moving only one of the clamping members 20 relative to the body 12.

In the clamp devices 10, 10a, an actuator (ie, an electric motor or the like) driven by electric energy may be used as a power source of a driving mechanism that causes the clamp member 20 to move, instead of a fluid pressure cylinder ( Piston 14 and cylinder section 35).

In addition, the clamp device of the present invention is not limited to the above-mentioned specific embodiments, and various configurations can be adopted without departing from the scope of the present invention as defined by the accompanying claims.

10‧‧‧clamp device

12‧‧‧Body

13‧‧‧cylinder bore

14‧‧‧ Piston

15‧‧‧Pressure chamber

15a‧‧‧First room

15b‧‧‧Second Room

16‧‧‧Leverage

18‧‧‧Clamping section

20‧‧‧Clamp member

22‧‧‧Cover

24‧‧‧Pressed components

27‧‧‧ First port

28‧‧‧Second port

30‧‧‧Cap

32‧‧‧Annular sealing member

34‧‧‧locking ring

36‧‧‧Basic section

37‧‧‧Trench

38‧‧‧Track groove

39‧‧‧Supporting member

40‧‧‧The main part of the piston

42‧‧‧Pole part

44‧‧‧Annular groove

46‧‧‧Annular piston seal

48‧‧‧Magnet

50‧‧‧Pole hole

52‧‧‧ Rod seal

53‧‧‧Damper

54‧‧‧Latch

56‧‧‧First end

58‧‧‧The second end

62‧‧‧Link bolt

64‧‧‧Cut part

66‧‧‧Base part

68‧‧‧ finger

69‧‧‧Root

74‧‧‧End plate

76‧‧‧joint groove

77‧‧‧screw

78a, 78c ‧‧‧ fixed plate

80‧‧‧insert hole

82‧‧‧Main wall

83‧‧‧protrusion

84‧‧‧Side wall

84a‧‧‧End

86‧‧‧Trench

88‧‧‧ Bellows section

90‧‧‧Seal member

92‧‧‧Annular ring member

94‧‧‧Suppression section

a‧‧‧Axis

Claims (5)

A clamping device (10, 10a) includes a body (12) and a clamping section (18) configured to open and close, the clamping section (18) includes a support on the body (12) A pair of clamping members (20) on the top, at least one clamping member of the pair of clamping members (20) is movable relative to the body (12), and by the clamping section (18) ) Clamping the workpiece, the clamp device (10, 10a) further includes: a cover member (22), which includes: an insertion hole (80) for the finger (68) of the clamp member (20) to be inserted through And a sealing member (90, 90a), which is configured to surround the insertion hole (80) and abut the outer peripheral surface of the finger (68), the cover (22) is attached to the body (12) To cover the base portion (66) of the pair of clamp members (20), and can be elastically deformed to follow the displacement of the clamp member (20); and the pressing members (24, 24a) are assembled so that the The sealing member (90, 90a) is pressed against the outer peripheral surface of the finger (68); the pressing member (24, 24a) is formed into a ring shape surrounding the finger (68), and the sealing member (90 90, 90a) is pressed against the outer peripheral surface of the finger (68), whereby the sealing member (90, 90a) is sandwiched between the pressing member (24, 24a) and the pressing member (24, 24a) in a radially elastic compression state Between the fingers (68). The clamp device (10) as described in item 1 of the patent application scope, wherein: the pressing member (24) includes a plurality of pressing sections (94) arranged side by side in a circumferential direction; and the sealing member (90) It is installed in the plurality of pressing sections (94) and the Between fingers (68). The clamp device (10) as described in item 1 of the patent application range, wherein the pressing member (24) is disposed inside the cover member (22). The clamping device (10a) as described in item 1 of the scope of the patent application, wherein the pressing member (24a) is disposed outside the cover member (22). The jaw device (10, 10a) as described in item 1 of the patent application scope, wherein: the other jaw member (20) of the pair of jaw members (20) may also be relative to the body (12) Moving; the cover (22) is further formed with another insertion hole (80) corresponding to the other jaw member (20) and another sealing member (90, 90a); and the jaw device is further equipped with the The other clamping member (20) corresponds to another pressing member (24, 24a).

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